Permutation door-lock.



J. PIGNOOGO.

PEEMUTATION DOOR LOCK.

APPLIOATION IILED JAN. 30, 1911.

1,015,832. Patented Jan. 30, 1912.

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APPLICATION FILED JAN. 30, 1911.

Patented J an. 30, 19.12.

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APPLICATION FILED JAN. 30, 1911.

Patented Jan. 30, 1912'.

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UNITED STATES JOHN PIGNOCCO, OF LA SALLE, ILLINOIS.

PERMUTA'I'ION DOOR-LOCK.

Specification of Letters Patent.

Patented Jan. 30,1912.

Application filed January 30, 1911. Serial No. 605,519.

To all whom it may concern Be it known that I, JOHN PIGNOCCO, a citizen of the United States, and a resident of the city of La Salle, county of Lasalle, and State of Illinois, have invented certain new and useful Improvements in Permutation Door-Locks, of which the following is a specification.

My invention relates to improvements in permutation or combination locks and more particularly to a door lock of this character to be in operative connection with an ordinary door knob.

The object of my invention is to provide improved means in a permutation lock for readily changing the permutation or combination of the lock whenever it may be deemed advisable.

A further object of my invention is to provide a permutation lock of the character mentioned which shall be simple of construct-ion, strong and durable, and efficient in operation.

Other objects will appear hereinafter.

With these objects in view my invention consists in the novel construction and ar rangements of parts all as will be herein after fully described and more particularly pointed out in the appended claims.

My invention will be more readily un derstood by reference to the accompanying drawings forming a part of this specification, and in which Figure l is a front end elevation of my improved permutation lock shown in operative position in a door, Fig. 2 is a side elevation of the latter, Fig. 3 is a detail section showing the means of attaching a door knob to the latch arbor of the lock, Fig. Q is a transverse section taken on line wa2 of Fig. 1, Fig. 5 is an end elevation of the lock, the cover thereof having been removed, Fig. 6 is a vertical longitudinal section of the lock taken on line zrm of Fig. 5, Figs. '7 and 8 are vertical longitudinal sections of the lock taken on lines yy and zz respectively, of Fig. 5, Fig. 9 is a horizontal section taken on line zz of Fig. 8, Fig. 10 is a detail top plan view of the tumblers employed in the device, and Fig. 11 is a detail end elevation of the oscillatory lever employed in the device.

The preferred form of construction of my invention as illustrated in the accompanying drawings comprises a lock casing l which is inserted in the inner side of a door 2 as illustrated in Figs. 1 and 2, a detachable front end plate 3 being provided on said casing to render the lock mechanism accessible. The latch arbor 4: of the lock is mounted transversely in the usual manner, and the same is provided with ordinary door knobs 5 having sockets 6 which are secured to the latch arbor by ineans of screws 7. The outside knob socket 6 is provided with a cylindrical recess 8 in which a helical spring 9 surrounding the arbor 4: is seated, one end of said spring being seated on a side of the casing 1 as indicated by dotted lines in Fig. 1. The latch arbor 4 is rotatable and adapted to move transversely relative to the'casing 1, either of the knobs 5 being capable of causing this trans verse movement. Movement in one direction of the arbor 4 is accomplished by pushing the outer lmob 5, the movement of said arbor in the reverse direction being imparted by the spring 9. The latch 10 of the lock is of the ordinary design and the mechanism for actuating the same will be described hereinafter.

to move the mechanism of the lock in such a manner as to render the same operative whenever this may be desired.

The construction of the lock is such that the same may be converted at will into an ordinary door latch or into a lock which cannot be opened except by a person knowing the combination or permutation of the lock thereof. The simple latch construction comprises the ordinary beveled latch or bolt 10 which projects through the removable end plate 3 of the casing 1. Said bolt is formed integral with a frame 12 which is arranged adjacent the front side of'the casing 1 and adapted to move longitudinally thereon, guide blocks 13 being provided for this purpose. An enlargement 14 is provided at the rear end of the frame 12 in the rear of which an oscillatory lever 15 is mounted. Said lever, when in the position shown in Fig. 9, prevents the frame 12 from being moved to the rear, hence when said lever is in the position noted, the latch bolt 10 cannot be moved for opening the door by revolving a knob 5. When the lever 15, which is pivoted on a screw 16, is oscillated so as not to be in registration with the enlarged portion 14, the frame 12 may be moved to the rear, which action is caused by the knobs 5 in the usual manner, bellcrank levers 17 engaging a disk 18 as shown in Fig. 8. The disk 18 is mounted on the arbor 4 so as to rotate freely thereon and the same is provided with peripheral notches 19 for engaging one arm of the bellcrank levers 17, said disk having a beveled edge 20 which is mounted in guide blocks 21, the latter serving to hold the disk adjacent the front side of the casing 1. Pro jecting from the rear side of the disk 13 adjacent the periphery thereof is a pin 22 by means of which the disk 18 is rotated, said pin being adapted to engage any one of a series of perforations 23 provided adjacent the periphery ofa disk 24 rigidly secured to the arbor 4 as illustrated in Fig. 9. The latch bolt 10 is normally held in the position shown in the several views by means of a spring 25. The means for rotatably mounting the square arbor 4 comprises peripherally grooved disks 26 which are rotatably mounted in the sides of the casing 1 as clearly illustrated in Fig. 9, these disks being provided with square central perforations in which the arbor 4 is slidably mounted. Thus, said arbor is free to rotate and to move transversely in the lock casing when the knobs 5 are manipulated.

From the foregoing description it is apparent that when the lever 15 is out of registration with the enlarged portion 14, that the door 2 may be opened and closed as is any ordinary door without a look. In order to render the lock mechanism operative, the lever 11 is depressed which causes the lever 15 to assume the position shown in Fig. 9 as will be described hereinafter.

The lock mechanism comprises a disk 27 which is mounted on the arbor 4 in such a manner as to rotate freely thereon and arranged contiguous to the disk 24, a series of perforations 28 being provided in the disk 27 which are adapted to register with the perforations 23 of the disk 24, these perforations being equally spaced and the same number being provided in each of said disks. Arranged contiguous to the disk 27 is a ratchet wheel 29 having teeth 30, the disk 27 being thus interposed between the disk 23 and the ratchet wheel 29. The latter is rigidly secured to the arbor 4 in any suitable manner, such as being pressed thereon, and is arranged to co-act with a pawl 31 pivoted to one side of the disk 27, a spring 32 serving to hold said pawl normally in mesh with one of the teeth 31. Projecting from the periphery of the disk 27 is a hook 33 which is adapted to engage one of the lock tumblers to be described hereinafter. In Fig. 9 the hook 33 is shown in a certain position relative to the arbor 4, but it is obvious that the position of said hook may be changed to any other position by means of the ratchet and pawl mechanism described, it being only necessary to rotate the disk 27 against the resistance of the spring 32 which holds the pawl 31 normally in engagement as aforesaid. Twenty perforations are provided in the disks 24 and 27, hence twenty different positions of the disk 27 relative to the disk 24 may be obtained. In this manner the relative positions of the hook 33 with the peripheral projection 34 of the disk 24 may be varied as desired. The projection 34 like the hook 33 is adapted to engage a tumbler of the lock, hence if two of the latter only were provided, the lock could be readily opened with proper manipulation of one of the knobs 5, but three tumblers are provided, hence further mechanism is necessary which will be presently described. A ratchet wheel 35 provided with ratchet teeth 36 is rigidly secured to the arbor 4 in a manner similar to the ratchet wheel 29, a pawl 37 being adapted to mesh with said ratchet teeth being pivoted to the rear side of said casing 1 by means of a pin 38, a wire spring 39 being adapted to maintain said pawl in normal contact with a stationary pin 40 as illustrated in Fig. 7 As will be noted from Fig. 5, the pawl 37 is not in mesh with a tooth 36 when the knobs 5 are in their outer position, it being clear that when the arbor 4 is moved inwardly that said pawl will engage with a tooth 36 as shown in Fig. 7 the stop pin 40 serving to hold said pawl in a proper position for meshing with the teeth 36. The ratchet wheel 35 is provided in addition to the teeth 36, with a series of peripheral notches 41, the number and arrangement of which is clearly illustrated in Fig. 7. Arranged normally in mesh with one of the notches 41 is a pawl 42 which is pivoted by means of a pin 43 to one side of a rotatable recessed disk 44 loosely mounted on the arbor 4 as shown in Fig. 9. A semi-circular spring 45 is connected to the pawl 42 and designed to maintain the same normally in mesh with a notch 41, said pawl thus serving to hold said disk in positive relation with the ratchet wheel 35. It is obvious, however, that the relation of the disk 44 with the ratchet wheel 35 may be changed as desired by seating the pawl 42 in any one of the several notches shown, the relation of the disk 44 with the ratchet wheel 35 being thus similar to the relation of the disk 24 with the ratchet wheel 29. In order to maintain the recessed disk 44 contiguous to the ratchet wheel 35 a circular plate 46 is secured to the arbor 4 in the position shown in Fig. 9, said disk 44 being adapted to move freely relative to said arbor as aforesaid. The disk 44 is provided with a series of radially disposed threaded pins 47, the number of which is equal to the perforations of the disks 24 and 27. These pins are provided with screw-driver slots 48 and are adapted to project from the periphery of the disk 44 or to be screwed therein so as to be flush therewith, as clearly illustrated in Fig. 9. hen the lock is in operative condit-ion one only of the pins 47 is screwed into the periphery of the disk 44 so as to be flush therewith, as shown in Fig. 7, it being apparent that any one of the pins may be chosen for this position. This pin projects into the central recess of the disk 44 as shown in Fig. 9 and the inner end of which is adapted to engage one of the tumblers of the lock.

As aforesaid, the lever 15, when in the position shown in Fig. 9, renders the lock operative, and in order to move said lever to the inoperative position, the lower end 49 thereof must be moved to the left as will be clear by reference to Fig. 11. The lever 15 is held in the normal position by a wire spring 50 which is secured to the rear end of the casing 1 as shown in Fig. 9. Arranged below the lower end 49 of the lever 15 is a bracket 51 having a horizontal slot 52 formed therein. 7 A tumbler-carrying lever 53 is pivoted to one side of the casing 1 by means of a lug 54 and a pin 55 is provided with a reduced extension 56 which is mounted in the slot 52 and adapted to reciprocate therein. The tumbler-carrying lever 53 is provided with a central aperture 57 in which the arbor 4 is free to revolve, and one side of said lever engages with a side of the disk 44 when the arbor 4 is moved outwardly. In the operation of opening the look if all of the tumblers are properly actuated, then the arbor 4 may be moved to the full outward position and cause the re duced extension 56 of the lever 53 to move the lower end 49 of the lever 15 to the left, thus causing the latter to be thrown out of registration with the enlargement 14 of the frame 12. This being done, thelatch 10 is readily moved when a knob 5 is rotated, but if all of the tumblers have 'not been properly actuated suflicient outward movement of the arbor 4 will not be permitted for the above described movement of the lever 53, only a partial movement of the latter being permitted. WVhen the lever 53 is moved fully outwardly it will be locked in this position automatically by means of a vertically movable arm 58 having a shoulder 59 which will obviously engage the rear side of said lever and thus hold the mechanism of the lock inoperative. The arm 58 is moved upwardly for the engagement of the shoulder 59 by a helical spring 60 which is positioned as shown in Fig. 7. The arm 58 is formed integral with a vertically disposed member 61 which is arranged to slide vertically in a guide socket 62, the latter projecting inwardly from the rear side of the casing 1 as clearly illustrated in Fig. 5. The spring 60 thus exerts a constant upward tension on the arm 58 and member 61, and in order to limit the upward movement of the latter, a stop projection 63 is formed on the lower end of the member 61 and adapted to engage the lower end of the socket62. In order to render the lock operative it is clear that the member 58 must be depressed to cause the disengagement of the shoulder 59 with the lever 53. This is accomplished by the lever 11, the inner end of which is reduced and projected into a perforation 64 provided at the juncture of the arm 58 with the member 61, this construction being clearly shown in the several views. The lever 11 is pivoted by means of a rivet 65 to the rear side of the casing l and when the forward end of said lever is elevated, the rearward end thereof will be depressed and cause the depression of the arm 58 and the disengagement of the shoulde 59 with the lever 53, thus effecting the desired operativeness of the lock.

After a knob 5 has been turned a partial revolution a radial projection 66 will contact with a stiff leaf spring 67 which is secured to an inwardly projecting lug 68 formed in the casing 1 as shown in Fig. 7, the disposition of said spring relative to the arbor 4 being substantially radial. The projection 66 is permitted to pass the spring 67 after the latter has been slightly flexed as shown in Fig. 7, the object of said spring being to indicate the position of the projection 6h.

The lock tumblers 69, 70 and 71 are sup ported by a tumbler-carrying lever 53 and are mounted between two lateral projections 72 provided on said lever. The threaded pin 47 which is mounted in the disk 44 and extends into the recess thereof is adapted to engage one end of a bell-crank 73 which is pivoted by means of a pivotal pin 74 in the tumbler-carrying lever '53, said bell-crank being normally held in the position shown by means of a coiled spring 75 as illustrated in Fig. 9. An elongated aperture 76 is provided in the tumbler-carrying lever 53 to provide clearance for the bell-crank 73 for the movement of the tumblers 70 and 71. The tumbler 69 consists in a hookformed at one end of a lever 77 which is pivoted inter mediate the projection 72 by means of a pivotal pin 78, as clearly illustrated in Fig. 9. The lever 77 is bifurcated, and pivoted between the bifurcated ends of said lever by means of a pivotal pin 79 is a bell-crank 80, the ends of which form the tumblers 70 and 71.

It will be observed from the foregoing description and by reference to Fig. 9, that if the threaded pin 47 which projects into the recess of the disk 44 is not in registration with the lever 77, then the latter cannot move toward the arbor 4, since any one of said pins, excepting the one projecting into the recess, will contact with said lever and prevent said movement, hence the tumbler 70 cannot be engaged with one end of the bell-crank 73 unless the inwardly projecting pin 47 is in registration with the lever 7 7 in which case there will be no obstruction to the movement of the latter.

In the operation of unlocking the mechanism, the exterior knob 5 is first moved inwardly, which action causes the pin 22 to be disengaged from the perforations 23 and 28, thus permitting the free rotation of the knob. Said knob is then rotated until the pin 66 comes into contact with the spring 67, the resistance caused by such contact being felt by the operator. Then the knob is rotated in either direction according to the combination of the lock, the extent of such rotation being indicated by the clicks of the pawl 37 engaging the teeth 86 of the wheel 35. The clicks of the pawl 37 are carefully counted by the operator in order to determine when to stop the rotation of the knob, when the rotation has ceased, the knob is pulled outwardly which causes the engagement of the projection 34 with the tumbler 69, thus causing the lever 77 to be moved toward the arbor 4. When the knob is pulled outwardly the inwardly projecting pin 4:7 engages the short arm of the bell-crank73, which action causes the long arm of said bell-crank to engage the tumbler 70 and to move the same into the position shown in Fig. 10. The tumbler 71 is moved simultaneously with the tumbler 70 and assumes the position as shown in Fig. 10 during the last described movement. The exterior knob is again moved inwardly and rotated as before, the extent of rotation being subjected to the combination of the lock. The hook 33 will now be in registration with the tumbler 71 and will engage the same as shown in Fig. 10, hence when the knob is pulled outwardly, the tumbler 71 will also be moved outwardly and cause the tumbler-carrying lever 53 to be moved into the outward position. This action will cause the lever 15 to be moved and the shoulder 59 to engage the lever 53 as before described. Now, on rotation of the knob, the latch 10 will be freely moved and the door unlocked. It will be observed that the positions of the projections 3 1, the hook 33 and the inwardly projecting pin 47 may be varied as desired, a change of one of said elements obviously changing the combina' tion or permutation of the lock. These changes may be effected by removing the end plate 3 of the casingl and by manipulating the disks as hereinbefore described. After the door has been unlocked the lock mechanism will remain inoperative until the exterior end of the lever 11 is elevated, and in order to elevate said lever sufiicient clearance must be provided in the door casing to render the same accessible.

A permutation door lock of the construction set forth is practically burglar proof and may be operated by a person knowing the combination in an expeditious manner.

Vhile I have illustrated and described the preferred construction for carrying my invention into effect this may be varied somewhat without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction as set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is 1. In a permutation door lock, the combination with a casing, of a rotary reciprocatory knob arbor mounted transversely in said casing, a spring arranged to actuate the same in one direction, a latch and means connected with said arbor for operating the same, an oscillatory lever for locking said latch in locking position, a series of tumblers, a tumbler-carrying lever bearing on said arbor and said first mentioned lever and adapted to move the latter to a position for releasing said latch, a pair of ratchet wheels mounted on said arbor, disks arranged contiguously with said ratchet wheels; pawls carried by said disks for engaging said ratchet wheels for effecting the adjustment of said disks and projections on said disks for actuating said tumblers successively, substantially as described.

2. In a permutation door lock, the combination with a casing, of a rotary reciprocatory knob arbor mounted transversely in said casing, a helical spring surrounding said arbor and adapted to actuate the same in one direction, a latch and means connected with said arbor for operating the same, an oscillatory lever for locking said latch in looking position, a series of tumblers, a tumbler-carrying lever connected with said arbor and said first-named lever and adapted to move the latter to a position for releasing said latch, a pair of ratchet wheels mounted on said arbor, adjustable disks arranged contiguously with said ratchet wheels, pawls carried by said disks for engaging said ratchet wheels for effecting the adjustment of said disks, and projections on said disks for actuating said tumblers successively, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN PIGNOCCO.

Vitnesses W'ILLIAM TREGORIONG, ANTONIO PARDIAMGO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

